Abstract: This paper reviews the basic content of key management. It introduces RSA public key cryptosystems and homomorphic encryption scheme in the integer ring. The homomorphism key agreement based on RSA and homomorphic encryption scheme is presented. The protocol can use the public key of RSA to create the contributory, forward secrecy the session key. Compared with Diffie-Hellman protocol and key agreement protocol based on password, it has separately quicker operation speed and better security. The security of the protocol is proved by BAN logic.

Key words: homomorphic encryption, key agreement, BAN logic

摘要：

回顾了密钥管理的基本内容，介绍了RSA公钥密码体制和整数环上的同态加密机制，提出了基于RSA的同态密钥协商。该协议主要利用RSA的公钥和同态加密机制建立一个会话密钥。与Diffie-Hellman以及基于口令的密钥协商协议相比，它分别有更快的运算速度和较好的安全性。利用BAN逻辑证明了该协议的安全性。

关键词: 同态加密, 密钥协商, BAN逻辑

CLC Number: 

• TP393